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(Sometimes spelled drouth.) A period of abnormally dry weather sufficiently long enough to cause a serious hydrological imbalance.

Drought is a relative term, therefore any discussion in terms of precipitation deficit must refer to the particular precipitation-related activity that is under discussion. For example, there may be a shortage of precipitation during the growing season resulting in crop damage (agricultural drought), or during the winter runoff and percolation season affecting water supplies (hydrological drought).
Compare dry spell;
see absolute drought, partial drought.

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